A child educated only at school is an uneducated child.

It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.

One test of the correctness of educational procedure is the happiness of the child.

The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

The most important part of teaching is to teach what it is to know.

What is now proved was once only imagined.

Those who fail to learn the lessons of history are doomed to repeat them.

The task of a writer is not to solve the problem but to state the problem correctly.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

Education is the most powerful weapon which you can use to change the world.

If you can't explain it simply, you don't understand it well enough.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

Science is what we have learned about how to keep from fooling ourselves.

You can never learn less, you can only learn more.

The reading of all good books is like conversation with the finest men of past centuries.

If you want the present to be different from the past, study the past.

Learning never exhausts the mind.

I cannot live without books.

If the facts don't fit the theory, change the facts.